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June 3, .1930, P. B. TAYLOR CRANKCASE VENTILATOR Filed Sept. 26, 1927 Patented June. 3, l 930 @AVL B. TAYLOR', 0F PONTIAC, MICHIGAN, ASSIGNOB TO GENERAL MOTORS CORPGBA- TJION, F DETROIT, MICHIGAN, A CORPOBATIUN' 0F DELAWARE CRANE-CASE VENTILATOB Application filed September 26, 199,7. Serial No. 222,124.

This invention relates to crankcase ventilationand has to do particularly with a combined oil feed pipe and crankcase ventilating means for the internal combustion engine of an automotive vehicle.

lt is an object of this invention to rovide a new and improved arrangement o pipes, one within another, for introducing oil into and for Ventilating an engine crankcase. More specilically it is an object of this invention to associate an improved oil filler pipe or tube with protected means which acts to filter incoming air entering therethrou h. lt is `portion 14 adapted to fit in and be fixed by an object of this invention to provide a steel wool lter 'for use with the oil filler tube so arranged that oil may be readily poured in without danger of splashing on the steel wool and destroying its liltering qualities. lt is a further object of the invention to provide an outlet pipe which is provided with baing means :for preventing the escape of oil and which extends down below the dustpan so that the foul air will not escape into the body of the car.

Other objects and advantages of the in vention will appear in the course of the following description, taken in connection with the `accompanying drawings and appended claims.

ln the drawings: Y v

Figure l is a front view partl v broken away of a conventional internal com ustion engine embodying my invention.

-Figure 2 is an enlarged sectional view of at on alla tube.

`liligure 3 is a section on the line 3-.3 of

lFigure 2.

Figure 4 is a horizontal section showing the arrangement of the outlet pipe.

Referring to the drawing, l have illustrained in Figure l a conventional internal combustion engine provided on the lleft hand side with an oil filler pipe 10 and on the right hand side with an outlet pipe 12.

The filler pipe comprises a main cylindrical means of a set screw 15 in an aperture in the ,engine cranlcase and is bevelled or out o' at an an le. on its lower end. The purpose of bevelhng the lower end of the pipe is to secure the benefit of the rotation of the crankshaft to produce an aspirating eect on the lower end of the pipe 10. On the upper end ofthe portion 14 of the filler pipe is secured a widened mouth element 18 and in this is fitted a funnel 20 provided with an inwardly extendin portion 22 which forms Aan aperture slig tly smaller than the portion 14 of the filler pipe, said funnel being thus held spaced from said pipe. n

Surrounding the widened mouth 18 and funnel and portion 14 of the filler pipe and spaced from the lower end thereof by an annular'plate 24 is shown an outer pipe or casing 26,. 'To .provide means for advancing air through this casina, the lower portion of the casing is split and dared out to provide wings 28 which open directly in the path of lthe blast of air from the ian. dust above the wings 28 is an angled partition 30 which supports a mass oi steel wool 32 between the pipe i4 and casing 26, the partition 30 and inwardly extending portion of the widened mouth element i8 being perforated to allow the passage of air theret rough. A cap 34 lits over the top of the tunnel 20 and is providedwith opposed downwardly extending fingers 33 adapted to cooperate with lian es or cam sur- Jlaces 36 on the fastening mem er 37 fixed on top ci the casing 26 for holdin the cap in place. A gasket 38 is arrange within the cap 34 to make the cap, substantially air tight. @n the right hand side of the engine 1s a valve cover plate 40 provided on its inner side with a polygonal bao plate 42 which is spaced from the outlet aperture 44 and covers this aperture completely, a narrow opening 46 being provided between the cover 40 and bao plate for allowing the passage of air and opens rearwardly, as shown at 54, for

causing an aspirating eect on the pipe.

Y The operation of the device will now be described. As the blast from the fan is cong verged by the' wings 28,

ressure is built u which causes a current o air to pass throng i the erforated partition 30, steel wool 32 and per orated partition of the widened mouth .18, down through the main portion le of the filler pipe, through the crankcase, and out through the valve cover 40 and outlet pipe 12.v The passage of this current is aided by the aspirating eeet on the lower end of the pipe When the cap is rethe 52 as described above. U moved and crankcase oil poured 1n,

funnel shown as secured within the outer vits pipe but as delivering into the inner pipe and as so spaced therefrom as to permit a passage of air therebetween, causes the oil to pass down through the part 1d of the filler pipe without getting into the steel wool. .The baa on the valve cover revents the escape of oilthrough the outlet pipe.

ll claim:

L For use upon aninternal combustion engine including a crankcase: a pipe fixed therein and provided with a perforated widened upper portion,a casing fitting about `engine including a ciankcase: a pipe i with a diverging opening, filtering means between saidcasing and pipe, and a reinovable cap fixed over the upper ends thereof. 3. An oil filler inlet comprising: la pipe having a perforated widened upper portion, a funnel in said upper portion and opening into said pipe, a casing about said upper part and spaced from the lower part thereof, saidcasing being provided with an opening in its lower part, filtering means between said casing and pipe, and a removable cap for said upper portion. v

4. An oil filler -inlet element provided with a perforated widened upper portion', a funnel interfitting within said upper portion and openinginto said pipe, a casing extending below said upper part and spaced from the lower part, said lower part of said inlet element, a lower part of said casing being provided with means for advancing air therethrough, filtering means between said casing and pipe, and a removable cap for said upper portion.

5. In means vfor introducing oil and 4air into a crankcase: pipes disposed one within the other and respectively provided withl means for directing oil and air thereto; means therebetween for filtering air and means for protecting said filtering means prising z` outer casing provided with an inlet and with meneer from oil, one of Ysaid pipes being provided with aspirating means. v

6. In means for introducing oil and air into a crankcase: pipes disposed one within the other and respectively provided with means for directing oil and air thereto;

means therebetween for filtering air; and

tecting said filtering means from oil, said protecting means comprising a funnel fitting within said outer pipe but delivering into said inner pipe, although so spaced therefrom as to permit passage of oil therebetween.

8. In means for introducing oil and air into a crankcaseipipes disposed one within the other and respectively provided with means for directing oil and' air thereto: means therebetween for filtering air; and means for protecting said filtering means from oil, said pipes being held in spaced relationship by a widened mouth element extending above the inner pipe.

9. For use upon a crankcase. a combined oil inlet and air inlet organization comprising: pipes disposed one within another, means for retaining a filtering material within 011e of said pipes; and means for so guiding oil into the other of said pipes as to obviate contact of said filtering material therewith.

10. A combined oil inletand ventilation air inlet organization for a crankcase com. prising: an inner pipe for oil; an outer casing'provided with forwardly open means to cause a current of air to pass through both said pi e and said casing; and air filtering means etween said casing and pipe.

11. A combined oil inlet and ventilation air inlet organization for a crankcase comprising: an inner pipe for oil: and an outer casing provided with a forward opening and forwardl divergent wings to effect an advance o air therethrough; and vfiltering .means confined above said opening and between saidcasing and pipe.

l2. A combined oil inlet and ventilation air inlet organization for a crankcase coinprising: an inner pipe for oil: and an outer casing provided with means to edect an advance ofair up through the casing and down through the pipe; air filtering means between said casing and pipe; and a removable cap for said combined inlet. y

13,. A combined oil inlet and ventilation ico air inlet organization for a crankcasecoman inner inlet pipe for oil: and an menen Y means to guide air into the casing and then throu h said pipe,said guidance means inclu ing side portions diverging forwardly; filtering means between said casing and pipe; and a removable capforone of said inlets.

In testimony whereof I aix my signature.

PAUL B. TAYLOR. 

